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Two-dimensional porous carbon skeletal nano-material and preparation method thereof

A nano-framework, porous carbon technology, applied in chemical instruments and methods, secondary batteries, catalysts for physical/chemical processes, etc. The effect of excellent electrical conductivity

Inactive Publication Date: 2016-09-28
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the problems in the prior art of using simple metal-organic framework nanoparticles as precursors to prepare carbon materials with small specific surface area, poor electrical conductivity, and single structure, the present invention proposes to use two-dimensional metal hydroxides as templates and utilize metals and organic ligands The coordination between the two-dimensional layered metal hydroxides and the surface confinement effect of the two-dimensional layered metal hydroxide are synthesized by solution at room temperature, and a variety of metal-organic framework nanoarrays are oriented on the surface of the two-dimensional layered nanomaterials, and then baked under an inert atmosphere Method for obtaining structured porous two-dimensional carbon framework materials

Method used

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  • Two-dimensional porous carbon skeletal nano-material and preparation method thereof
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  • Two-dimensional porous carbon skeletal nano-material and preparation method thereof

Examples

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Embodiment 1

[0022] Synthesis of two-dimensional porous carbon nanoskeleton materials on the surface of cobalt aluminum hydrotalcite:

[0023] a: get 0.1 cobalt aluminum hydrotalcite and disperse in 50mL methanol solution;

[0024] b: Dissolving 1 g of cobalt nitrate and 8 g of 1,2-dimethylimidazole in the methanol solution dispersed with cobalt-aluminum hydrotalcite, centrifuging, washing, and drying after magnetic stirring for 30 min at room temperature;

[0025] c: put the product obtained in step b into an atmosphere furnace, and continuously roast at 800° C. for 2 hours under the protection of nitrogen, wherein the heating rate is 2° C. / min.

[0026] The divalent metal ion of the cobalt aluminum hydrotalcite is Co 2+ , the trivalent metal ion is Al 3+ , the molar ratio of cobalt to aluminum is 2:1.

[0027] The specific surface area of ​​the two-dimensional porous carbon nano-skeleton material prepared above is 325m 2 g -1 , the sheet diameter is 6μm, and the thickness is 500nm. ...

Embodiment 2

[0029] Synthesis of two-dimensional porous carbon nanoskeleton materials on the surface of zinc aluminum hydrotalcite:

[0030] a: Get 0.1 zinc aluminum hydrotalcite and disperse it in 50mL ethanol solution;

[0031] b: 1g of zinc nitrate and 3g of trimesic acid were dissolved in the above-mentioned ethanol solution dispersed with zinc-aluminum hydrotalcite, centrifuged, washed and dried after magnetic stirring for 10min at room temperature;

[0032] c: put the product obtained in step b into an atmosphere furnace, and continuously roast at 700° C. for 2 hours under the protection of nitrogen, wherein the heating rate is 2° C. / min.

[0033] The divalent metal ion of the zinc-aluminum hydrotalcite is Zn 2+ , the trivalent metal ion is Al 3+ , the molar ratio of zinc to aluminum is 2:1.

Embodiment 3

[0035] Synthesis of two-dimensional porous carbon nanoskeletons on the surface of cobalt-iron hydrotalcite:

[0036] a: Get 0.5 cobalt iron hydrotalcite and disperse it in 50mL methanol solution;

[0037] b: Dissolve 0.5 g of ferric nitrate and 8 g of 1,2-dimethylimidazole in the above-mentioned methanol solution dispersed with cobalt-iron hydrotalcite, centrifuge, wash and dry after magnetic stirring for 30 min at room temperature;

[0038] c: put the product obtained in step b into an atmosphere furnace, and continuously roast at 800° C. for 2 hours under the protection of nitrogen, wherein the heating rate is 2° C. / min.

[0039] The divalent metal ion of the cobalt-iron hydrotalcite is Co 2+ , the trivalent metal ion is Fe 3+ , the molar ratio of cobalt to iron is 2:1.

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Abstract

The invention discloses a preparation method of a two-dimensional porous carbon skeletal nano-material. The method comprises the following steps: growing various metal organic frame nano-arrays on the surface of a two-dimensional layered nano-material in an orientated manner through room temperature solution synthesis by using the coordination effect of a metal and an organic ligand and the surface confinement effect of two-dimensional layered metal hydroxide with two-dimensional layered hydroxide as a template, and roasting the various metal organic frame nano-arrays in inert atmosphere to obtain the two-dimensional porous carbon skeletal nano-material with a regular structure. The method realizes orientated growth and artificial regulation of the metal organic frame material in the nanometer level for the first time, and the two-dimensional porous carbon skeletal nano-material prepared through roasting can be widely applied to the fields of electrocatalysis and electrochemical energy storage due to its specific surface area, unique tunnel structure and excellent electric conductivity.

Description

technical field [0001] The invention belongs to the field of synthesis of inorganic nano-materials, in particular to a two-dimensional porous carbon nano-skeleton material and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of modern science and technology, especially nanotechnology, microscopically ordered materials have attracted widespread attention due to their excellent physical and chemical properties. Among all kinds of ordered materials, carbon materials have become the focus of research topics due to their promising application prospects in fuel cells, hydrogen storage, and macromolecular adsorption. [0003] Since the successful synthesis of fullerenes was first reported in 1985, carbon materials have attracted more and more scientists' attention. In 1991, Sumio Iijima of Japan’s NEC Corporation published an article in Nature reporting that the discovery of carbon nanotubes immediately caused a sensation, and...

Claims

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Application Information

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IPC IPC(8): B01J23/75B01J23/06B01J35/10B01J35/04H01G11/36H01M4/583H01M10/0525
CPCH01M4/362H01M4/583H01M10/0525H01G11/36B01J23/002B01J23/06B01J23/75B01J2523/00B01J35/56B01J35/60B01J35/40B01J2523/17B01J2523/31B01J2523/845Y02E60/10
Inventor 邵明飞栗振华卫敏段雪
Owner BEIJING UNIV OF CHEM TECH
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